You want to make sure you can lift the boxes easily and if they happen to tumble over they don t hurt anyone.
Boxes in attic.
Those cardboard boxes stacked up in your attic could become a veritable buffet for mice and bugs if you re not careful.
Cardboard boxes will deteriorate due to heat and water and animals and bugs will snack on them in the meantime.
Pests are attracted to the cardboard and to the glue used in construction of the box says santoro.
Boxes also break down and disintegrate which will attract pests even more.
A few more universal.
Use the attic to store anything that is impervious to heat.
Think empty boxes and suitcases.
If they are 2x6 you can probably get away with some boxes filled with relatively light stuff.
As a very general guide if the joists are only 2x4s don t plan on storing much in the attic other than very lightweight items.
Joists that are 2x8 or larger can likely support more weight.